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답안 #289570

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
289570 2020-09-02T18:25:46 Z eohomegrownapps 고대 책들 (IOI17_books) C++14
50 / 100
 239 ms 36072 KB 
#include "books.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

vector<ll> cycle;
vector<int> p;
ll n;

ll minc = 1e9;
ll maxc = -1e9;

struct UFDS{
	int n;
	vector<int> parent;
	UFDS(int _n){
		n = _n;
		parent.resize(n);
		for (int i = 0; i<n; i++){
			parent[i]=i;
		}
	}

	int root(int i){
		if (parent[i]==i){return i;}
		return parent[i]=root(parent[i]);
	}

	void connect(int a, int b){
		int ra = root(a);
		int rb = root(b);
		if (ra==rb){return;}
		parent[ra]=rb;
	}

	bool connected(int a, int b){
		return root(a) == root(b);
	}
};

ll findcycle(ll i, ll ptr){
	cycle[i] = ptr;
	minc=min(minc,i);
	maxc=max(maxc,i);
	if (cycle[p[i]]!=-1){
		return abs(i-p[i]);
	} else {
		return abs(i-p[i]) + findcycle(p[i], ptr);
	}
}

ll minimum_walk(std::vector<int> px, int s) {
	p = px;
	n = p.size();
	cycle.resize(n,-1);

	ll cycledist = 0;
	ll ptr = 0;

	vector<pair<int,int>> cycleranges;
	vector<ll> cyclewidth(n+1);
	ll minv = 1e9;
	ll maxv = -1e9;
	for (ll i = 0; i<n; i++){
		if (cycle[i]!=-1){continue;}
		minc=1e9;maxc=-1e9;
		ll dist = findcycle(i,ptr);
		if (dist!=0){
			minv=min(minv,minc);
			maxv=max(maxv,maxc);
		}
		cycleranges.push_back({minc,maxc});
		cyclewidth[minc]++;
		cyclewidth[maxc]--;
		cycledist+=dist;
		ptr++;
	}

	ll prev = 0;
	bool iszero = true;
	ll ctr = 0;
	ll minabove=1e9;
	ll maxbelow=-1e9;
	bool isbetween = false;
	for (ll i = 0; i<=n; i++){
		ctr+=cyclewidth[i];
		if (ctr==0&&i==s){
			isbetween=true;
		}
		if (iszero&&ctr>0){
			if (i<=s){
				maxbelow=max(maxbelow,i);
			}
			if (i>=s){
				minabove=min(minabove,i);
			}
			if (prev!=0){cycledist+=2*(i-prev);}
			iszero = false;
		} else if ((!iszero)&&ctr==0){
			if (i-1<=s){
				maxbelow=max(maxbelow,i-1);
			}
			if (i-1>=s){
				minabove=min(minabove,i-1);
			}
			prev = i;
			iszero = true;
		}
	}
	//cout<<maxbelow<<' '<<minabove<<endl;
	if (maxbelow==-1e9&&minabove==1e9){
		return 0;
	} else if (s<=minv||s>=maxv){
		return cycledist+2*min(minv-s,maxv-s);
	} else if (!isbetween){
		UFDS u(cycleranges.size());
		for (int i = 0; i<cycleranges.size()-1; i++){
			for (int j = i+1; j<cycleranges.size(); j++){
				int as = cycleranges[i].first;
				int ae = cycleranges[i].second;
				int bs = cycleranges[j].first;
				int be = cycleranges[j].second;
				if ((as<=bs&&bs<=ae&&bs<=ae&&ae<=be)||(bs<=as&&as<=be&&as<=be&&be<=ae)){
					u.connect(i,j);
				}
			}
		}
		vector<pair<int,int>> ranges(cycleranges.size(),{1e9,-1e9});
		for (int i = 0; i<cycleranges.size(); i++){
			int r = u.root(i);
			ranges[r].first=min(ranges[r].first,cycleranges[r].first);
			ranges[r].second=max(ranges[r].second,cycleranges[r].second);
		}
		vector<pair<int,int>> intersectingranges;
		for (auto p : ranges){
			if (p.first==1e9){continue;}
			if (p.first<=s&&s<=p.second){
				intersectingranges.push_back(p);
			}
		}
		sort(intersectingranges.begin(),intersectingranges.end());
		for (auto p : intersectingranges){
			cout<<p.first<<' '<<p.second<<endl;
		}
		ll dist = 0;
		for (int i = 0; i<intersectingranges.size()-1; i++){
			dist+=min(abs(intersectingranges[i+1].first-intersectingranges[i].first),
				abs(intersectingranges[i].second-intersectingranges[i+1].second));
		}
		//cout<<dist<<endl;
		cycledist+=2*dist;
	}
	return cycledist;
}

Compilation message

books.cpp: In function 'll minimum_walk(std::vector<int>, int)':
books.cpp:118:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  118 |   for (int i = 0; i<cycleranges.size()-1; i++){
      |                   ~^~~~~~~~~~~~~~~~~~~~~
books.cpp:119:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  119 |    for (int j = i+1; j<cycleranges.size(); j++){
      |                      ~^~~~~~~~~~~~~~~~~~~
books.cpp:130:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  130 |   for (int i = 0; i<cycleranges.size(); i++){
      |                   ~^~~~~~~~~~~~~~~~~~~
books.cpp:147:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  147 |   for (int i = 0; i<intersectingranges.size()-1; i++){
      |                   ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 0 ms 256 KB Output is correct
18 Correct 0 ms 256 KB Output is correct

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 0 ms 256 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 512 KB Output is correct
22 Correct 0 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 0 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct

Subtask #3
28.0 / 28.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 0 ms 256 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 512 KB Output is correct
22 Correct 0 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 0 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 226 ms 27768 KB Output is correct
31 Correct 239 ms 27768 KB Output is correct
32 Correct 159 ms 36072 KB Output is correct
33 Correct 164 ms 36068 KB Output is correct
34 Correct 163 ms 36068 KB Output is correct
35 Correct 165 ms 36012 KB Output is correct
36 Correct 156 ms 29932 KB Output is correct
37 Correct 151 ms 28404 KB Output is correct
38 Correct 155 ms 27896 KB Output is correct
39 Correct 159 ms 27768 KB Output is correct
40 Correct 172 ms 27768 KB Output is correct
41 Correct 186 ms 27712 KB Output is correct
42 Correct 186 ms 27768 KB Output is correct
43 Correct 173 ms 36068 KB Output is correct

Subtask #4
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 384 KB secret mismatch
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 1 ms 256 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 256 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 1 ms 256 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 0 ms 256 KB Output is correct
14 Correct 0 ms 256 KB Output is correct
15 Correct 0 ms 256 KB Output is correct
16 Correct 1 ms 256 KB Output is correct
17 Correct 0 ms 256 KB Output is correct
18 Correct 0 ms 256 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 512 KB Output is correct
22 Correct 0 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 0 ms 384 KB Output is correct
25 Correct 1 ms 384 KB Output is correct
26 Correct 0 ms 384 KB Output is correct
27 Correct 1 ms 384 KB Output is correct
28 Correct 1 ms 384 KB Output is correct
29 Correct 1 ms 384 KB Output is correct
30 Correct 226 ms 27768 KB Output is correct
31 Correct 239 ms 27768 KB Output is correct
32 Correct 159 ms 36072 KB Output is correct
33 Correct 164 ms 36068 KB Output is correct
34 Correct 163 ms 36068 KB Output is correct
35 Correct 165 ms 36012 KB Output is correct
36 Correct 156 ms 29932 KB Output is correct
37 Correct 151 ms 28404 KB Output is correct
38 Correct 155 ms 27896 KB Output is correct
39 Correct 159 ms 27768 KB Output is correct
40 Correct 172 ms 27768 KB Output is correct
41 Correct 186 ms 27712 KB Output is correct
42 Correct 186 ms 27768 KB Output is correct
43 Correct 173 ms 36068 KB Output is correct
44 Incorrect 1 ms 384 KB secret mismatch
45 Halted 0 ms 0 KB -